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Maturity and Post Harvest Study of Pineapple with Quality and Shelf Life Under Red Soil

M. Dhar
MS student
Department of Horticulture, Bangladesh Agricultural University, Mymensigh

S. M. Rahman
Assistant Professor
Department of Soil Science, Hajee Mohammad Danesh Science and Technology University, Dinajpur

S. M. Sayem
Assistant Professor
Department of Soil Science, Hajee Mohammad Danesh Science and Technology University, Dinajpur

Abstract/ Executive Summary:

A field experiment was conducted at the Horticulture, Food Technology and Rural Industries and IPM laboratories, Bangladesh Agricultural University during the period from July to September, 2003 to study the maturity and post harvest study of pineapple with quality and shelf life under red soil during storage under Madhupur district. The experiment was laid out in the Completely Randomized Design (CRD) with three maturity stages and six post harvest treatments and with three replications. Changes in different physico-chemical aspect of pineapple fruits and shelf-life were studied during the storage period. Stage-I fruit exhibited the maximum shelf-life (21.05 days), while the minimum shelf-life (12.70 days) was recorded in stage-III fruits. The highest shelf-life (27.33 days) was recorded in stage-I fruits under the low temperature treatment. The higher Juice content (64.65%) edible portion (69.80%), reducing sugar (4.89%), total sugar (13.36%), total soluble solid (12.50%) and pH (3.93%) were obtained from stage-III fruits, while stage-I fruits contained higher ascorbic acid (24.41 mg/100 g fruit pulp), moisture content (87.28%) and titratable acidity (0.826%) at initial stage. Among the physico-chemical parameters such as, total weight loss, edible portion, juice content, TSS, and pH increased with the progress of storage period, and total sugar content declined after an initial increased. On the other hand, moisture content, reducing sugar and titratable acidity decreased with the advancement of storage period.

Keywords: Maturity, Shelf-life, Storage period, Juice content

Location: Laboratories of the department of Horticulture, Food Technology and Rural Industries, Bangladesh Agricultural University, Mymensingh

Start Date: 00-07-2003

End Date: 00-09-2003

Program Area: Postharvest and Agro-processing

Commodity: Pineapple

Objectives:

To study the maturity and post harvest study of pineapple with quality and shelf life under red soil during storage under Madhupur district.

Methodology:

The experiment was conducted in the laboratories of the department of Horticulture, Food Technology and Rural Industries, Bangladesh Agricultural University, Mymensingh during the period from July to September, 2003. The experiment was laid out in Completely Randomized Design (CRD) with three maturity stages and six post-harvest treatments and with three replications. The maturity stages treatments were: Stage – I (S₁) = 14 days before optimum mature stage, stage – II (S₂) = 7 days before optimum mature stage and stage – III (S₃) = optimum mature stage and six post harvest treatments were: control (T₀), 100 ppm GA₃ (T₁), 100 ppm NAA (T₂) low temperature (T₃), covering with straw (T₄) and perforated polythene bag (T₅). The test crop was pineapple fruits of the variety giant Kew. External fruit characteristics were measured by the standard color chart. Total weight loss of fruit was determined by the weighing a balance and kept for storage. Percent of weight loss was calculated by using the formula. Moisture content of fruit pulp was estimated, Juice content of fruit pulp was measured by blended with blending machine. The percentage of juice content of the fruit pulp was calculated by using the formula. Edible portion of fruit was determined by balance and pulp to peel ratio was determined by separately weighing pulps and peels of fruits of each treatment and each replication by using electrical balance. Sugar in fruit pulp was measured by the method. Estimation of non-reducing sugar was measured by the formula. Estimation of total sugar was determined. Total soluble solid (TSS) content of fruit Juice was estimated by using Abbe refractometer. A drop of pulp solution squinted from the fruit pulp on the prism of refractometer. The percentage of TSS was obtained from direct reading of the instrument temperature correction were made by using the methods. Extraction of pineapple Juice was determined by the formula. TSS to acidity ratio of fruit pulp was calculated. Ascorbic acid content of fruit pulp was determined to the method by using 2, 6-Dichlophenol-Indophenol visual Titration method. Shelf-life of pineapple fruits as influenced by different post harvest treatment and maturity stages were calculated by counting the days required to attain the last stage of ripening but the fruits remaining still fit for marketing and eating qualities.

Source of Information: Int. J. Sustain. Crop Prod. 3(2):69-75, 2008

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

For immediate consumption as fresh fruit the optimum mature stage appeared to be the best. Earlier harvesting might be appropriate for canning and long distance transport. Keeping the harvested fruits at low temperature or treated with 100 ppm GA3 appeared to be suitable for extending the shelf-life as well as other quality attributes of pineapple fruits.

Knowledge Management: Journal